I am assuming your using your 5.0 harness on the 5.8 motor being swapped in. you will need to find a 93 5.8 dizzy and get the cam gear pressed off, you will then have the 89 5.8 dizzy cam gear swapped over to the 93 5.8 dizzy. most any shop can do this.

Or you could dismantle the 5.0 distributor you have, drill a hole/cut a slot in the 5.8 dizzy in the same place that the PIP harness comes through on your 5.0 distributor, and install the 5.0 PIP module in the 5.8 dizzy and reassemble it. I did the opposite mod to a 5.8 distributor one time.. worked great.

Three things are different between these two distributors..
- 89 dizzy has an onboard TFI module and the 93 uses a remote, that means the PIP module inside is connected differently.
- 5.0 motor has a roller cam while the 5.8 had a flat tappet(steel gear vs cast iron)
- 5.8 dizzy has larger journals and oilpump driveshaft than the 5.0 so these are not interchangable.